ELECTRICAL CONDUCTANCES OF AQUEOUS SODIUM TRIFLUOROMETHANESULFONATE FROM 0 TO 450-DEGREES-C AND PRESSURES TO 250 MPA

The electrical conductances of dilute (0.001 To 0.1 mol-kg(-1)) aqueous sodium trifluoromethanesulfonate (NaCF3SO3) solutions have been measured from 0 to 450 degrees C and pressures to 250 MPa. The limiting molar conductance Lambda(o) increases with increasing temperature from 0 to 300 degrees C and decreasing density from 0.8 to 0.3 g-cm(-3). Above 300 degrees C, Lambda(o) is nearly temperature independent, but increases linearly with decreasing density. The logarithm of the molal association constant of NaCF3SO3 calculated at temperatures from 372 to 450 degrees C is represented as a function of temperature (Kelvin) and density of water (g-cm(-3)) by log K-m = 0.888 = 330.4/T - (12.83 - 5349/T)log rho(w) The relative strengths of NaCF3SO3 and NaCl are similar within the accuracy of the current measurements over the limited range of temperature and pressure that could be investigated here.